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    Under what conditions does hydrogen peroxide oxidise aqueous cobalt ions from the +2 to the +3 state according to these standard electrode potentials?

    [Co(NH3)6]3+(aq) + e ⇌ [Co(NH3)6]2+(aq) Eᵒ = + 0.10 V

    H2O2(aq) + 2H+(aq) + 2e ⇌ 2H2O(l) Eᵒ = + 0.177 V

    [Co(H2O)6]3+(aq) + e ⇌ [Co(H2O)6]2+(aq) Eᵒ = + 1.82 V
    • A) in aqueous solution
    • B) in the presence of excess ammonia
    • C) in the presence of excess hydrochloric acid
    • D) in the presence of excess sodium hydroxide
    Thanks!
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    (Original post by optimizesem)
    Under what conditions does hydrogen peroxide oxidise aqueous cobalt ions from the +2 to the +3 state according to these standard electrode potentials?

    [Co(NH3)6]3+(aq) + e ⇌ [Co(NH3)6]2+(aq) Eᵒ = + 0.10 V

    H2O2(aq) + 2H+(aq) + 2e ⇌ 2H2O(l) Eᵒ = + 0.177 V

    [Co(H2O)6]3+(aq) + e ⇌ [Co(H2O)6]2+(aq) Eᵒ = + 1.82 V
    • A) in aqueous solution
    • B) in the presence of excess ammonia
    • C) in the presence of excess hydrochloric acid
    • D) in the presence of excess sodium hydroxide
    Thanks!
    ... and your ideas are?
 
 
 
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